Portable footrest



FIG. 1 is a front elevational view of a portable footrest showing our new design with the footrest at a detached position;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a perspective view thereof; and,

FIG. 6 is a perspective view showing the footrest at an assembled position. 

the ornamental design for a portable footrest, as shown and described. 